Subtract 4/21 from 98/30, Solve 3 8/30

Subtract 4/21 from 98/30

1^st number: 3 8/30, 2^nd number: 4/21

98/30 - 4/21 is 323/105.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 30 × 7 = 210,
98/30 = 98 × 7/30 × 7 = 686/210
Likewise, for the 2nd fraction, since 21 × 10 = 210,
4/21 = 4 × 10/21 × 10 = 40/210
Subtract the two like fractions:
686/210 - 40/210 = 686 - 40/210 = 646/210
After reducing the fraction, the answer is 323/105
In mixed form: 38/105

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